police say the family's car, a 2011 sky blue subaru outback is also missing. >> has an idaho license plate number of 1a 1f 7680. so far police have not made any arrests or released any motive for the killing either. >>> in san francisco, 22 people were arrested this afternoon after a protest turned violent. this is cell phone video sent into our newsroom. police say a group of demonstrators, many wearing masks covering their faces took to the streets near california and battery, vandalizing cars and businesses and disrupting traffic along the way. when police in riot gear intervened, protesters reportedly threw flares and bags of paint at the officers. one officer was hit in the head, but he is expected to be okay. police say some of the protesters were armed with hammers, ice picks, and other weapons. it's still unclear at this point what they were protesting. >>> and now on to the bay's big weekend. baseball, fleet week, america's cup to name a few. between today and tomorrow, the city is expecting close to one million visitors. those visitors were warned traffic could be terrible.